In new construction, installing a dishwasher involves several delicate plumbing and electrical tasks best left to professionals. But if you’re simply replacing your old dishwasher with a new model, most of the work is already done. Here’s how to proceed.
Remove Your Old Dishwasher
Before anything else, check your owner’s manual. Some dishwasher models include extra parts or specific instructions that you’ll need to follow in reverse when disconnecting the unit.
- Switch off the corresponding breaker at the electrical panel to cut power to the dishwasher, and close the water shut-off valve under the sink.
- Unscrew the access panel at the front of the dishwasher.
- Disconnect the old electrical connections.
- Place a shallow pan or towel under the supply and drain fittings before disconnecting the hoses, to catch any water that drains out.
- Unscrew the mounting brackets that secure the dishwasher to the cabinet or countertop.
- Slide a blanket or a large piece of cardboard under the feet of your old dishwasher before pulling it out of its spot, to avoid damaging the floor.
Prepare Your New Dishwasher for Installation
Check the owner’s manual for your new dishwasher: some manufacturers have specific instructions that may differ from the general advice below. Complete the steps below before sliding your new dishwasher into place, while certain parts remain easy to access.
- Unscrew the front access panel.
- Connect the 90-degree elbow fitting to the water valve, following your owner’s manual.
- Replace the old water supply and drain hoses with new ones.
- Make sure the drain hose is positioned higher than the drain outlet. Otherwise, you risk self-siphoning: water automatically drains back out instead of staying in the unit, which would force you to redo the installation.
- Temporarily tape the hoses to the floor so they don’t shift while you slide the dishwasher into place.
Since it’s strongly recommended to replace your hoses every five years, installing a new dishwasher is an excellent time to do it. For added durability, choose braided metal hoses.
Connect Your New Dishwasher
Once again, use a blanket or a large piece of cardboard to avoid damaging the floor as you push the dishwasher into place.
- Connect the water supply hose to the 90-degree elbow fitting. Tighten with pliers to ensure a watertight seal.
- Open the water shut-off valve under the sink and check for leaks. If there’s no shut-off valve, we recommend having one installed by a plumber. In case of a leak, this lets you react quickly and limit the damage.
- Connect the drain hose and complete the electrical hookup, as indicated in your owner’s manual.
Finish the Installation
You can restore power at the electrical panel. Your dishwasher is now functional! The remaining steps ensure a safe installation and optimal performance from your appliance.
- Check that the dishwasher is level. If needed, adjust the leveling feet at the front — too sharp an angle can let water leak out through the door when it’s opened.
- Secure the dishwasher to the cabinet or countertop with mounting brackets. This often-overlooked precaution keeps the dishwasher from tipping forward: a hard pull on the door or a fully loaded top rack is enough to cause damage.
- Put the access panel back in place.
To prevent water damage, you should always be present while your dishwasher is running. This is especially important the first time you run it!
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Need parts?
Need Dishwasher Parts?
Installing a new dishwasher is a great opportunity to replace worn parts that aren’t always included, such as the supply hose or certain fittings. To make sure you buy the right replacement part, get in touch with our team. Our trained staff can advise you and identify the exact part you need, and if necessary, have it delivered to your home.